| 摘要 |
<p>Assembly for discharging waste gases and/or supplying air, comprising a shaft (1) with vertical walls that enclose channels for transport of the gases and sealing means sealing the top end of the shaft (1), through which means the channels debouch via nozzles, the shaft (1) being mountable upon the roof (4) of a building. According to the invention the sealing means comprise modules with which, by juxtaposing the modules, the horizontal section of the shaft (1) is sealable and in that, moreover, the modules can be arranged one on top of the other so as to form levels.</p> |
